Bolt for double doors.



No. 652,279. Patented lune 26, 1900. P. LAUER.

BoLfT FOR DOUBLE noos.

(Application filed Oct. 9, 1899) (No Model.)

/ lili! line a: cc of Fig. l.

NITED i.

TATES PETER LAUER, OF MHVAUKEE, XVISCONSIN.

SPECIFICATION forming part of Letters Patent No. 652,279, dated J' une 26, 1900'.

Application filed October 9, 1 899.

To all whom, it may concern:

Be it known that I, PETER LAUER a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of VVisconsin, have invented new and useful Improvements in Door-Fastenings for Double Swinging Doors, of which the following is a specification.

My invention relates to improvenents in door-fastenings for doubleswinging doors.

The object of my invention is to provide means whereby a connecting disk for operating a set of vertical novable looking-bolts may also be adapted to engage any ordinary looking-bolt entering from an opposite door, together with ineans for checking the movenent of the disk when the bolts are adjnsted at the extremity of their line of movement.

Iu the following description referen ce-is had to the accompanying drawings; in which Figure l is a side elevation of my improved doors, showing one of the doors partially in section drawn in the plane of the securingbolts. Fig. 2 is a detail perspective View of the disk. Fig. 3 is a sectional View drawn on Like parts areidentified by the same reference-letters in all the views.

A andB are the doors. The door A, which is the one usually opened, is provided with the custonary knob or handle C and a horizontally-noving looking-bolt D, operated by a key inserted in the keyholeE in the nsnal manner. The door B is, however, provided with a channel F in its front edge, with a central recess G of greater depth at a height corresponding with that of the looking-bolt D of the other door. The channel and recess are covered bya strip H, Secured to the front edge of the door.

i/Vithin the recess Gr is a disk I, to which the shank J of the knob or handle C' is se cured, so that the shank J pivotally supports and forms a fulcrnm for the disk. Securingbolts K are connected with the disk I by connectin g rods or bars L and extend upwardly and downwardly in the channel F, as shown in Fig. 1. The bolts are of such length that by turning the handle C' in one direction they will be forced by the disk into the sockets M and N in the door-sill and the upper cross- Serial No. 733,010. (No model.)

tion shown the con necting-rod L of the lower i securing-bolt engages against the rear wall of the recess G at R when the bolts are in their looking position,and when unlocked the nove= ment of the bolts is limited by a flange S, carried by the crank-disk I and which engages the connecting-rod L of the` npper bolt when the bolts are wholly withdrawn froni the sockets. With this Construction, therefore, the fiange S serves as a stop for the novable partswhen the bolts are 'etracted, and the rear wall of the recess perfol-ins a similar function when the bolts are in their looking position.

Having thus described nyinvention, what I claim as new, and desire to secure by Letters Patent, is-

The conbination with a set or pair of swinging doors, one of which is provided with a lock of ordinary type; of a disk located in a central recess in the other door ot' said set, and provided with a notch adapted to reeeive any ordinary looking-bolt entering from the opposing door; a fiange projecting laterally fron one side of said notch; and securing-bolts slidably located in closed vertical Channels within the door and connected with said disk; said channels being forned so that one of the Walls thereof will form a stop for the connections of the secnring-bolt, when aotuated in one direction; and said flange being adapted to serve as a stop for said connections when actuated in the opposite direction.

In testinony whereof I affix my signature in the presence of two witnesses.

PETER LAUER.

XVitnesses:

JAs. B. IRwIN, LEVERETT C. WHEELER. 

